error: `[const]` can only be applied to `const` traits
  --> $DIR/const-bounds-non-const-trait.rs:6:21
   |
LL | const fn perform<T: [const] NonConst>() {}
   |                     ^^^^^^^ can't be applied to `NonConst`
   |
help: mark `NonConst` as `const` to allow it to have `const` implementations
   |
LL | #[const_trait] trait NonConst {}
   | ++++++++++++++

error: `[const]` can only be applied to `const` traits
  --> $DIR/const-bounds-non-const-trait.rs:6:21
   |
LL | const fn perform<T: [const] NonConst>() {}
   |                     ^^^^^^^ can't be applied to `NonConst`
   |
   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: mark `NonConst` as `const` to allow it to have `const` implementations
   |
LL | #[const_trait] trait NonConst {}
   | ++++++++++++++

error: `const` can only be applied to `const` traits
  --> $DIR/const-bounds-non-const-trait.rs:10:15
   |
LL | fn operate<T: const NonConst>() {}
   |               ^^^^^ can't be applied to `NonConst`
   |
help: mark `NonConst` as `const` to allow it to have `const` implementations
   |
LL | #[const_trait] trait NonConst {}
   | ++++++++++++++

error: aborting due to 3 previous errors